Method for extracting vanadium by stone coal and sulfuric acid wet pile oxidation conversion at normal temperature and pressure

Abstract

The invention provides a method of leaching vanadium by adding sulfuric acid to stone coal, wet-stacking, oxidizing and converting under the normal temperature and pressure. The method comprses the following steps: (1) dry-grinding bone coal into bone coal powder with a diameter of 1-5mm; (2) adding sulfuric acid and water with a mass ratio of bone coal powder :sulfuric acid :water of 100:10-25:5-12, stirring uniformly, wet-stacking under the normal temperature and pressure for 3-15 days with a stacking height equal to or larger than 2m, and the sulfuric acid is industrial sulfuric acid; (3) adding water according to a solid-liquid weight ratio of 1:0.7-1.5 under the normal temperature and pressure, stirring and leaching for 30-120 minutes, adjusting the PH value to 2-3, and filtering the final solution for deslagging to obtain a blue vanadic sulfate solution.The invention has characteristics of small investment, low energy-consumption, high coefficient of metal recovery, low producing cost and small environmental pollution.

Description

technical field

[0001] The invention relates to a method for extracting vanadium, in particular to a method for oxidizing, transforming and leaching vanadium by adding sulfuric acid to wet pile of stone coal at normal temperature and pressure. Background technique

[0002] Vanadium and its compounds are widely used in metallurgy, aerospace, chemical and other industrial sectors. Vanadium can improve the strength, toughness, ductility and heat resistance of steel. Metal vanadium can also be used in magnetic materials, cast iron, hard alloys, superconducting materials and In nuclear reactor materials and other fields, vanadium pentoxide and other vanadium compounds are mainly used as colorants in the glass and ceramic industries, sulfuric acid and catalysts for petrochemical production. Vanadium catalysts have special activity and cannot be replaced by other elements. With the rapid development of metallurgy and chemical industry, the application range of vanadium is getting w...

Examples

Embodiment 1

[0022] (1) dry-grinding the stone coal primary ore containing 0.98% vanadium mass percentage into stone coal powder with a particle diameter of about 1mm; (2) adding according to the mass ratio of stone coal powder: sulfuric acid: water=100:12:8 Industrial sulfuric acid and water, stir evenly, under normal temperature and pressure, wet pile for 9 days, and the height of the pile is about 4 meters; (3) under normal temperature and pressure, add water according to the ratio of solid to liquid weight ratio of 1:1, stir and leach 70 minutes, adjust the pH value to 2.5, filter to remove residue, and obtain a blue vanadyl sulfate solution. The vanadium leaching rate is 80%.

Embodiment 2

[0024] (1) dry-grinding the stone coal primary ore containing 0.98% vanadium mass percentage into stone coal powder with a particle diameter of about 1mm; (2) adding according to the mass ratio stone coal powder: sulfuric acid: water=100:15:8 Industrial sulfuric acid and water, stirred evenly, under normal temperature and pressure, wet heap for 9 days, with a height of about 4.5 meters; (3) under normal temperature and pressure, add water according to the ratio of solid-liquid weight ratio of 1:1, stir and leaching 80 minutes, adjust the pH value to 2.5, filter to remove residue, and obtain a blue vanadyl sulfate solution. Vanadium leaching rate is 78%.

Embodiment 3

[0026] (1) dry-grinding the stone coal primary ore containing 0.98% vanadium mass percentage into stone coal powder with a particle diameter of about 1mm; (2) adding according to the mass ratio of stone coal powder: sulfuric acid: water=100:20:7 Industrial sulfuric acid and water, stirred evenly, under normal temperature and pressure, wet heap for 7 days, with a height of about 5 meters; (3) under normal temperature and pressure, add water according to the ratio of solid-liquid weight ratio of 1:1.2, stir and leaching 50 Minutes, adjust the pH value to 2.6, filter to remove residue, and obtain a blue vanadyl sulfate solution. Vanadium leaching rate is 91%.

technical field

[0001] The invention relates to a method for extracting vanadium, in particular to a method for oxidizing, transforming and leaching vanadium by adding sulfuric acid to wet pile of stone coal at normal temperature and pressure. Background technique

[0002] Vanadium and its compounds are widely used in metallurgy, aerospace, chemical and other industrial sectors. Vanadium can improve the strength, toughness, ductility and heat resistance of steel. Metal vanadium can also be used in magnetic materials, cast iron, hard alloys, superconducting materials and In nuclear reactor materials and other fields, vanadium pentoxide and other vanadium compounds are mainly used as colorants in the glass and ceramic industries, sulfuric acid and catalysts for petrochemical production. Vanadium catalysts have special activity and cannot be replaced by other elements. With the rapid development of metallurgy and chemical industry, the application range of vanadium is getting w...

Examples

Embodiment 1

[0022] (1) dry-grinding the stone coal primary ore containing 0.98% vanadium mass percentage into stone coal powder with a particle diameter of about 1mm; (2) adding according to the mass ratio of stone coal powder: sulfuric acid: water=100:12:8 Industrial sulfuric acid and water, stir evenly, under normal temperature and pressure, wet pile for 9 days, and the height of the pile is about 4 meters; (3) under normal temperature and pressure, add water according to the ratio of solid to liquid weight ratio of 1:1, stir and leach 70 minutes, adjust the pH value to 2.5, filter to remove residue, and obtain a blue vanadyl sulfate solution. The vanadium leaching rate is 80%.

Embodiment 2

[0024] (1) dry-grinding the stone coal primary ore containing 0.98% vanadium mass percentage into stone coal powder with a particle diameter of about 1mm; (2) adding according to the mass ratio stone coal powder: sulfuric acid: water=100:15:8 Industrial sulfuric acid and water, stirred evenly, under normal temperature and pressure, wet heap for 9 days, with a height of about 4.5 meters; (3) under normal temperature and pressure, add water according to the ratio of solid-liquid weight ratio of 1:1, stir and leaching 80 minutes, adjust the pH value to 2.5, filter to remove residue, and obtain a blue vanadyl sulfate solution. Vanadium leaching rate is 78%.

Embodiment 3

[0026] (1) dry-grinding the stone coal primary ore containing 0.98% vanadium mass percentage into stone coal powder with a particle diameter of about 1mm; (2) adding according to the mass ratio of stone coal powder: sulfuric acid: water=100:20:7 Industrial sulfuric acid and water, stirred evenly, under normal temperature and pressure, wet heap for 7 days, with a height of about 5 meters; (3) under normal temperature and pressure, add water according to the ratio of solid-liquid weight ratio of 1:1.2, stir and leaching 50 Minutes, adjust the pH value to 2.6, filter to remove residue, and obtain a blue vanadyl sulfate solution. Vanadium leaching rate is 91%.